Window function (upper panel) and GLS periodograms of the CARMENES RVs for G 268−110 before (‘0P’, middle) and after subtracting the one-planet model (‘1P’, bottom). The two panels on the left and right represent the same GLS periodograms but plot different regions to better represent the occurring signals. The period of the 1.43-day planet is highlighted by a red solid line. Its first-order aliases at 3.28 d and 0.59 d are marked by red dashed lines, and the second-order aliases at 0.76 d and 0.43 d by red dotted lines. The rotation period of 143 d determined by Newton et al. (2018) is indicated by a solid green line.